package servelt;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;



public class HttpServer {
	/** WEB_ROOT is the directory where our HTML and other files reside.
	 * For this package, WEB_ROOT is the "webroot" directory under the
	 * working directory.
	 * The working directory is the location in the file system
	 * from where the java command was invoked.
	 * 
	 */
	public static final String WEB_ROOT = System.getProperty("user.dir") + File.separator + "webroot";
	//shutdown command
	private static final String SHUTDOWN_COMMAND = "/SHUTDOWN";
	// the shutdown command received
	private boolean shutdown = false;
	
	public static void main(String[] args) {
		HttpServer server = new HttpServer();
		server.await();
	}
	
	public void await(){
		ServerSocket serverSocket = null;
		int port = 8080;
		try{
			serverSocket = new ServerSocket(port, 1, InetAddress.getByName("localhost"));
		} catch(IOException e) {
			e.printStackTrace();
			System.exit(1);
		}
		// Loop waiting for a request
		while(!shutdown) {
			Socket socket = null;
			InputStream input = null;
			OutputStream output = null;
			try {
				socket = serverSocket.accept();
				input = socket.getInputStream();
				output = socket.getOutputStream();
				// create Request object and parse
				Request request = new Request(input);
				request.parse();
				// create Response object
				Response response = new Response(output);
				response.setRequest(request);
				response.sendStaticResource();
				// Close the socket
				socket.close();
				// check if the previous URI is a shutdown command
				shutdown = request.getUri().equals(SHUTDOWN_COMMAND);
			} catch(Exception e) {
				e.printStackTrace();
				continue;
			}
		}
	}

}
